Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE 24-02 Contacts: Jayshree Desai, CFO Media – Liz James Kip Rupp, CFA, IRC - Investors FGS Global Quanta Services, Inc. (281) 881-5170 (713) 629-7600 QUANTA SERVICES REPORTS FOURTH QUARTER AND FULL-YEAR 2023 RESULTS Full-Year 2024 Guidance Reflects Solid Growth in Revenues and Opportunity for Double-Digit Growth in Net Income, Adjusted EBITDA, Cash Flow From Operations and Earnings Per Share Fourth Quarter 2023 Results Include: • Consolidated Revenues of $5.78 ...

Quanta Services, Inc. (NYSE:PWR) Q3 2023 Earnings Conference Call November 2, 2023 9:00 AM ET Company Participants Kip Rupp – Vice President-Investor Relations Duke Austin – President and Chief Executive Officer Jayshree Desai – Chief Financial Officer Conference Call Participants Michael Dudas – Vertical Research Partners Justin Hauke – Baird Neil Mehta – Goldman Sachs Andy Kaplowitz – Citigroup Marc Bianchi – TD Cowen Steven Fisher – UBS Operator Greetings, and welcome to the Quanta Services Thir ...

Third Quarter 2023 Earnings Call Presentation November 2, 2023 Notice to Investors This presentation (and oral statements regarding the subject matter of this presentation) includes forward-looking statements intended to qualify under the “safe harbor” from liability established by the Private Securities Litigation Reform Act of 1995. These forward-looking statements include any statements reflecting Quanta's expectations, intentions, strategies, assumptions, plans or beliefs about future events or performa ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023. or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-13831 Quanta Services, Inc. (Exact name of registrant as specified in its charter) Delaware 74-2851603 (State or other j ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023. or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-13831 Quanta Services, Inc. (Exact name of registrant as specified in its charter) Delaware 74-2851603 (State or other jurisd ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023. or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Number: 001-13831 Quanta Services, Inc. (Exact name of registrant as specified in its charter) Delaware 74-2851603 (State or other juris ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 _____________________________________________ Form 10-K (Mark One) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-13831 Quanta Services, Inc. (Exact name of registrant as specified in its charter) Delaware 74-2851603 (State or other juri ...